Small-diameter drilling

We also perform small-diameter drilling, also known as ram drilling or probe drilling, in accordance with DIN EN ISO 22475-1, with a diameter of 36-80 millimetres. This involves driving a sampling tube into the soil using a hydraulic hammer. After each successive metre of penetration, we pull the rod back up and extract the soil samples. Small-diameter drilling is the most inexpensive sampling procedure, but it can only be employed down to a relatively restricted depth. Moreover, small-diameter drilling produces impaired soil samples of quality classes 3 to 5.